mrmBot-Matrix/natives/colors.cc

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#include <napi.h>
#include <iostream>
#include <list>
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#include <vips/vips8>
using namespace std;
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using namespace vips;
VImage sepia = VImage::new_matrixv(3, 3, 0.3588, 0.7044, 0.1368, 0.2990, 0.5870,
0.1140, 0.2392, 0.4696, 0.0912);
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Napi::Value Colors(const Napi::CallbackInfo &info) {
Napi::Env env = info.Env();
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try {
Napi::Object obj = info[0].As<Napi::Object>();
Napi::Buffer<char> data = obj.Get("data").As<Napi::Buffer<char>>();
bool old =
obj.Has("old") ? obj.Get("old").As<Napi::Boolean>().Value() : false;
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string color = obj.Get("color").As<Napi::String>().Utf8Value();
string type = obj.Get("type").As<Napi::String>().Utf8Value();
int delay =
obj.Has("delay") ? obj.Get("delay").As<Napi::Number>().Int32Value() : 0;
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VOption *options = VImage::option()->set("access", "sequential");
VImage in =
VImage::new_from_buffer(data.Data(), data.Length(), "",
type == "gif" ? options->set("n", -1) : options)
.colourspace(VIPS_INTERPRETATION_sRGB);
VImage out;
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if (color == "blurple") {
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out = in; // TODO: figure out how to implement blurple
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} else if (color == "grayscale") {
out = in.colourspace(VIPS_INTERPRETATION_B_W);
} else if (color == "sepia") {
out = in.flatten().recomb(sepia);
}
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/*for (Image &image : coalesced) {
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if (color == "blurple") {
image.threshold(49151.25);
image.levelColors(old ? "#7289DA" : "#5865F2", "white");
} else if (color == "grayscale") {
image.quantizeColorSpace(GRAYColorspace);
image.quantizeColors(256);
} else if (color == "sepia") {
image.sepiaTone(49151.25);
}
image.magick(type);
image.animationDelay(delay == 0 ? image.animationDelay() : delay);
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colored.push_back(image);
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}*/
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if (delay) out.set("delay", delay);
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void *buf;
size_t length;
out.write_to_buffer(("." + type).c_str(), &buf, &length);
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vips_thread_shutdown();
Napi::Object result = Napi::Object::New(env);
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result.Set("data", Napi::Buffer<char>::Copy(env, (char *)buf, length));
result.Set("type", type);
return result;
} catch (std::exception const &err) {
throw Napi::Error::New(env, err.what());
} catch (...) {
throw Napi::Error::New(env, "Unknown error");
}
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}